Proteins

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  • Created by: emma
  • Created on: 09-03-14 14:04
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  • Proteins
    • Amino acids
      • H2N
        • HCR
          • COOH
      • Condensation reaction
        • Add H2O
      • Hydrolysis reaction
        • Peptide bond breaks
        • H2O formed
        • Two amino acids formed
    • Structure
      • Primary structure
        • Chain of amino acids
        • proteins differ because of their primary structure
      • Secondary structure
        • Polypeptide folds into alpha helix or beta pleat sheet
      • Tertiary structure
        • Forms shape as R groop bonds together
        • Hydrogen bonds (weak)
        • Ionic bonds (weak)
        • Disulphide bridges
      • Quaternary structure
        • Two or more polypeptide chains bonded together
    • Biuret test
      • Add sodium hydroxide
        • Add copper sulphate
          • colour change from blue to violet

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